pkg/oci: Initial pod command implementation
pkg/oci: Initial pod command implementation

With arguments, environment variables, and CWD.

Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

wcwxyz/virtcontainers,wcwxyz/virtcontainers,wcwxyz/virtcontainers,containers/virtcontainers,containers/virtcontainers